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Diffstat (limited to 'Build/source/libs/freetype/net.m4')
-rw-r--r-- | Build/source/libs/freetype/net.m4 | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/Build/source/libs/freetype/net.m4 b/Build/source/libs/freetype/net.m4 new file mode 100644 index 00000000000..254473be86f --- /dev/null +++ b/Build/source/libs/freetype/net.m4 @@ -0,0 +1,55 @@ +dnl +dnl The following was written by jhawk@mit.edu +dnl +dnl AC_LIBRARY_NET: Id: net.m4,v 1.4 1997/10/25 20:49:53 jhawk Exp +dnl +dnl This test is for network applications that need socket() and +dnl gethostbyname() -ish functions. Under Solaris, those applications need to +dnl link with "-lsocket -lnsl". Under IRIX, they should *not* link with +dnl "-lsocket" because libsocket.a breaks a number of things (for instance: +dnl gethostbyname() under IRIX 5.2, and snoop sockets under most versions of +dnl IRIX). +dnl +dnl Unfortunately, many application developers are not aware of this, and +dnl mistakenly write tests that cause -lsocket to be used under IRIX. It is +dnl also easy to write tests that cause -lnsl to be used under operating +dnl systems where neither are necessary (or useful), such as SunOS 4.1.4, which +dnl uses -lnsl for TLI. +dnl +dnl This test exists so that every application developer does not test this in +dnl a different, and subtly broken fashion. +dnl +dnl It has been argued that this test should be broken up into two seperate +dnl tests, one for the resolver libraries, and one for the libraries necessary +dnl for using Sockets API. Unfortunately, the two are carefully intertwined and +dnl allowing the autoconf user to use them independantly potentially results in +dnl unfortunate ordering dependancies -- as such, such component macros would +dnl have to carefully use indirection and be aware if the other components were +dnl executed. Since other autoconf macros do not go to this trouble, and almost +dnl no applications use sockets without the resolver, this complexity has not +dnl been implemented. +dnl +dnl The check for libresolv is in case you are attempting to link statically +dnl and happen to have a libresolv.a lying around (and no libnsl.a). +dnl +AC_DEFUN(AC_LIBRARY_NET, [ + # Most operating systems have gethostbyname() in the default searched + # libraries (i.e. libc): + AC_CHECK_FUNC(gethostbyname, , + # Some OSes (eg. Solaris) place it in libnsl: + AC_CHECK_LIB(nsl, gethostbyname, , + # Some strange OSes (SINIX) have it in libsocket: + AC_CHECK_LIB(socket, gethostbyname, , + # Unfortunately libsocket sometimes depends on libnsl. + # AC_CHECK_LIB's API is essentially broken so the following + # ugliness is necessary: + AC_CHECK_LIB(socket, gethostbyname, + LIBS="-lsocket -lnsl $LIBS", + AC_CHECK_LIB(resolv, gethostbyname), + -lnsl) + ) + ) + ) + AC_CHECK_FUNC(socket, , AC_CHECK_LIB(socket, socket, , + AC_CHECK_LIB(socket, socket, LIBS="-lsocket -lnsl $LIBS", , -lnsl))) + ]) |